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C Programming that can find Determinant of 3 x 3 Matrix
#1
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 #include<stdio.h>

int main(){

int a[3][3],i,j;

long determinant;

printf("Enter the 9 elements of matrix: ");
for(i=0;i<3;i++)
for(j=0;j<3;j++)
scanf("%d",&a[i][j]);

printf("\nThe matrix is\n");
for(i=0;i<3;i++){
printf("\n");
for(j=0;j<3;j++)
printf("%d\t",a[i][j]);
}

determinant = a[0][0]*((a[1][1]*a[2][2]) - (a[2][1]*a[1][2])) -a[0][1]*(a[1][0]*a[2][2] - a[2][0]*a[1][2]) + a[0][2]*(a[1][0]*a[2][1] - a[2][0]*a[1][1]);

printf("\nDeterminant of 3X3 matrix: %ld",determinant);

return 0;
}

Sample output:
Enter the 9 elements of matrix: 1
2
3
4
5
6
7
8
9

The matrix is

1 2 3
4 5 6
7 8 9

Determinant of 3X3 matrix: 0
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